Rectifying-commutator and method of making same



(No Model.) 2 Sheets-Sheet 1.

H. G. REIST. REGTIFYING GOMMUTATOR AND METHOD OF MAKING SAME.

Patented Jan. 29, 1895.

(No Model.)

2 Sheets-Sheet 2. H. G. REIST. REOTIFYING GOMMUTATOR AND METHOD OFMAKING SAME.

Patented Jan. 29, 1895.

UNITED STATES PATENT OFFICE.

HENRY G. REIST, OF SOHENEOTADY, NEW YORK, ASSIGNOR TO THE THOMSON-HOUSTON ELECTRIC COMPANY, OF BOSTON, MASSACHUSETTS.

RECTlFYlNG-COMMUTATOR AND METHOD OF MAKING SAME.

SPECIFICATION forming part of Letters Patent No. 533,084, dated January29, 1895.,

Application filed October 19,1 894- Serial No. 526,864- (No model.)

To ttZZ whom it may concern.-

Be it known that I, HENRY G. REIs'r, a citizen of the United States,residing at Schenectady,in the county of Schenectady, State of 5 NewYork, have invented certain new and useful Improvements in Oommu'tatorsand Methods of Making the Same, of which the following is aspecification.

My invention relates to the commutators of dynamoelectric machines; andhas for its object to provide a cheap and simple method of making arectifying commutator for an alternating current dynamo, or motor of thesynchronous type. It has especial advantages I more particularly for thelarger sizes of commutators,

To the ends pointed out, I construct my commutator of a single ring ofmetal having a deep internal groove, leaving two flanges,

one upon each side. I then bore through the ring from opposite sides asfar as this groove and channel out the spaces between the borings sothat the ring is by this means divided into two different rings exceptfor the face 2 5 holding the two flanges together. In the borings Iinsert wooden plugs, and then divide the face of the commutator withsaw-cuts extending from the face down into the plugs. In these cuts Iput mica or other customary o insulation, and then apply the usualclamping rings. By this means I obtain two wheels or rings havingregistering portions separated from each other by insulation, they beingsomewhat like the so-called crown wheel 5 in appearance, and theconstruction is a rigid and economical one, well adapted to the purposesfor which it is used. As will be seen, alternate sections of thecommutator are connected to each other by the metal of the ring,

so that, in the particular construction exemplified, it is only adaptedfor use as a rectifying commutator for alternating current.

The accompanying drawings show illustrations of my invention, Wherein-Figure 1 is a side elevation; Fig. 2, a section upon the line 22 ofFig. 1. Fig. 3 is a side elevation looking to the right,with the holesbored and the intervening spaces cut away; Fig. 4, a similar viewlooking to the left; Fig. 5, a section upon the line 5 5 of Fig. 3, allof the double-flanged ring. Fig. 6 is a side elevation showing thecommutator completed except the clamping rings. Fig. 7 is an enlargeddetail, and Fig. 8 is a sectional end view of the commutator with theclamping rings attached.

Referring to the drawings by letter, A is the ring, of which B, B arethe side flanges, separated by the groove L. As will be seen, the outersurface of the ring is turned smooth, and is that upon which the brushesare intended to bear.

Referring to Fig. 3, the flange B is shown in side elevation, and inthis flange holes 0,

O are bored reaching through to the groove L. Alternate spaces betweenthese holes are cut away, as shown at F.

In Fig. 4 I show the opposite flange B in which similar holes 0 arebored and similar cut-away spaces F are formed, but these alternate inposition with those shown in Fig. 3.

Fig. 5 shows more clearly the construction, the reference letters usedbeing the same as those in former figures.

In Fig. 6 I show the commutator advanced a step nearer completion.Therein the pins D, D of wood are shown driven into the holes, andslots, E, E, are cut through from the edge of the commutator into eachhole, a saw-kerf reaching into the wood of the pins D. 'In each of thesekerfs a strip of mica M is inserted, as seen best in Fig. 7, and is keptin place by a pin M driven through the wood of the pin D and through themica.

In Fig.8 I show the completed commutator, clamping rings G, H beingapplied to the two sides thereof and being held together by bolts 1, I,a thick sheet or ridge of insulation forming the ridges K, K, beingapplied between the clamping ring and the commutator to prevent 9oshort-circuiting. At N I show one of the leads by which currentisintroduced,the other one not being shown in the drawings.

By the terms alternating current dynamo or motor I do not meannecessarily a single 65 phase alternating machine, but I mean to includealso multiphase machines, as the application of my invention to currentsof one or more phases is practically the same, and in this sense theterm is used in the claims.

What I claim as new, and desire to secure by Letters Patent of theUnited States, is=- 1. The process of making a rectifying commutatorherein set out, which consists in providing a ring with a plurality offlanges and an internal groove, boring through the flanges to thegroove, slotting between the holes alternately on each flange, cuttingthrough from the face of the commutator to the holes, insortinginsulation in the cuts, and securing the parts together, as set out.

2. A rectifying commutator composed of registering portions cut from aflanged ring having an internal groove, and having suitable insulationbetween the registering portions.

3. In a rectifying commutator, the combination of a double-flanged ring,cut-away portions upon each flange alternating in position, outsextending from the face of the commutator to the cut-away portions, andmeans for securing the parts together.

t. In a rectifying commutator, the combination of a double-flanged ringhaving an internal groove, cut-away portions upon the flangesalternating in position, wooden pins in the cut-away portions, cutsextending from the face of the commutator partly through the woodenpins, insulation in such cuts, and means for securing the partstogether.

5. In a rectifying commutator, the combination of a double-flanged ringhaving an internal groove, slots alternating in position upon the twoflanges, Wooden pins in the slots, cuts extending from the face of thecommutator partly through the wooden pins, insulation in such cuts,clamping rings and bolts to hold the parts together, and insulationbetween the rings and the commutator.

In witness whereof I have hereunto set my hand this 10th day of October,1894-.

HENRY G. REIST.

Witnesses:

B. B. HULL, O. L. HAYNES.

